It's Hard for Evil Lords to Raise Haughty Concubines

The pitiful failure was reborn, awakening the talents within her... but it turns out she was only pretending to be weak, while hiding her true strength?! The notorious reputation of the so-called failure began to spread far and wide, her name attracting countless challengers. Naturally, in the end... she'll conquer all who stand in her way! When meeting the evil demon lord, she even dares to call him a pervert?! If these two can join forces, just what kind of bewildering change can they bring upon the world?